Description Our classic 6" fitted boxer brief with fly features feather-seam™ construction, and an exposed elastic core-flex™ waistband to ensure maximum comfort. In between sizes? Order one size up for the best fit. Medium Support Cotton Blend 6" Inseam Feather-Seam™ Construction Hidden Core-Flex™ Waistband Fit and Fabric 93% cotton, 7% elastane